Browsing by Author "Dadandi M.Y."
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Item A karyotypic study on Silene, section Siphonomorpha species of Turkey(2008) Yildiz K.; Minareci E.; Çirpici A.; Dadandi M.Y.Karyology of the eight taxa of Silene sect. Siphonomorpha known from Turkey was investigated. Diploid chromosome numbers and the basic chromosome number of the studied taxa were obtained as 2n =24 and x = 12, respectively. A karyotype analysis of the studied taxa was carried out and the chromosome numbers of S. splendens, S. amana and S. phrygia were determined for the first time. The smallest chromosomes were observed in S. fruticosa and the largest in S. italica subsp. italica. Silene splendens showed the highest A 1 index, whereas S. amana had the highest interchromosomal asymmetry coefficient(A 2). The karyologic results of the study and the analysis of chromosomal morphology of each taxon is presented.Item Silene cirpicii (Caryophyllaceae), a new species from Turkey(Finnish Zoological and Botanical Publishing Board, 2009) Yildiz K.; Dadandi M.Y.Silene cirpicii K. Yildiz & Dadandi sp. nova (Caryophyllaceae) is described and illustrated from N Anatolia, Turkey. Diagnostic morphological characters for distinction from the similar S.falcata, S. caryophylloides and S. argaea are given along with their chorological characteristics. Ultrastructure of the seeds and pollen grains was examined using SEM.Item A palynological investigation of endemic taxa from Northern Cyprus(2009) Yildiz K.; Gücel S.; Dadandi M.Y.Palynology of 19 endemic plant taxa belonging to 9 families distributed in North Cyprus was investigated by both light (LM) and scanning electron microscopy (SEM). The pollen grains were measured and their aperture characteristics and surface ornamentation determined. The systematic positions of the taxa as well as the genera they belonged to were investigated according to the data obtained. The largest pollen grains were found in Salvia veneris Hedge and the smallest ones in Onosma caespitosum Kotschy. The pollen type was generally termed trizonocolpate, pollen shapes spheroidal, prolate, subspheroidal, perprolate, supraprolate, pollen structure tectate and semitectate, and ornamentation scabrate, striate, microechinate, microperforate, reticulate, microreticulate, bireticulate, psilate and rugulate.Item Silene demirizii sp. nov. and S.marschallii subsp. anamasi subsp. nov. (Caryophyllaceae) from Turkey(2010) Yildiz K.; Çirpici A.; Dadandi M.Y.Two new taxa of Silene L. (Caryophyllaceae) from Turkey, Silene demirizii K. Yi{dotless}ldi{dotless}z & Çi{dotless}rpi{dotless}ci{dotless} sp. nov. and Silene marschallii C. A. Meyer subsp. anamasi K. Yi{dotless}ldi{dotless}z & Dadandi{dotless} subsp. nov. are described and illustrated. Their taxonomic positions are discussed and they are compared with allied taxa. The distributions of the new and closely related species are mapped. Pollen grain and seed coat ultrastructure of the new and allied taxa were examined by SEM. © 2010 The Authors.Item Pollen morphology of sections Siphonomorpha and Lasiostemones of the genus Silene from Turkey; [Türkiye'de yayılış gösteren Silene cinsi Siphonomorpha ve Lasiostemones seksiyonlarının polen morfolojisi](Turkiye Klinikleri, 2011) Yildiz K.; Dadandi M.Y.; Minareci E.; Çirpici A.The pollen morphology of 16 taxa belonging to the sections Siphonomorpha Otth and Lasiostemones Boiss. from the genus Silene L. (Caryophyllaceae) was examined via scanning electron microscopy (SEM). Pollen types among all of the examined taxa were spheroidal, ornamentations were generally microechinate-microperforate (punctate), but perforate in Silene viridiflora L., structures were mostly tectate but were observed to be semitectate only in S. viridiflora, the highest pore numbers were found in S. fruticosa L. and S. viridiflora, the lowest pore numbers were those of S. gigantea L. subsp. rhodopea (Janka) Greuter and S. marschallii C.A.Mey., and interpore distance was greatest in S. gigantea subsp. rhodopea and smallest in S. amana Boiss. The widest perforation was observed in S. Viridiflora, whereas the lowest value was observed in S. olympica Boiss. As a result of these detailed examinations, some Silene species with significant taxonomic problems were reviewed in terms of palynology, and suggestions are provided about their positions. S. viridiflora was determined to be the taxon with the most different pollen morphology according to general characters. According to pore number and perforation, the most advanced taxon was S. Viridiflora, while the most primitive taxa were found to be S. olympica, S. gigantea subsp. rhodopea, and S. olympica. © TÜBİTAK.Item Comparision of antimicrobial activity of Silene laxa Boiss. & Kotschy and Silene caramanica Boiss. & Heldr different extracts from Turkey(2013) Toroglu S.; Keskin D.; Dadandi M.Y.; Yildiz K.The antimicrobial activities of the extracts of ethyl acetate, chloroform, methanol, ethanol and acetone Silene laxa Boiss. & Kotschy and Silene caramanica Boiss. & Heldr were studied by disc diffusion method. These extracts were tested against seven bacteria and one fungus, which revealed various levels of antimicrobial activity. The ethanol extracts of Silene laxa leaves showed the best antibacterial activity against Pseudomonas aeruginosa, Enterobacter cloacae, Bacillus megaterium (15mm 30 μl-1). The chloroform extracts of S. laxa branches displayed the best antibacterial activity against E. cloacae (16mm 30 μl-1). The ethyl acetate extracts of S.laxa fruits showed the best antibacterial activity against B.megaterium and E.cloacae (15mm 30 μl-1). The methanol extracts of S. laxa leaves showed the best antibacterial activity against Staphylococcus aureus (18 mm 30 μl-1). The methanol extracts of S. laxa fruits showed the best antibacterial activity against B.megaterium (14mm 30 μl -1).Item Seed morphology of some Silene L. (Caryophyllaceae) species collected from Turkey(Turkiye Klinikleri Journal of Medical Sciences, 2015) Dadandi M.Y.; Yildiz K.The seed micro- and macromorphology of 39 Silene taxa were studied by stereomicroscope and scanning electron microscope. Quantitative (9) and qualitative (11) values of seed characters vary greatly both within and between taxa. The tree topology of UPGMA based on quantitative values does not supported the traditional relationship. Therefore, we concluded that seed characters of Silene alone cannot be used to describe taxa without detecting the full range of intra- and intertaxon variation of those characters. © TÜBİTAK.Item Silene nemrutensis (Caryophyllaceae), a new species from south-eastern Anatolia(Magnolia Press, 2017) Yildiz K.; Çirpici A.; Dadandi M.Y.; Firat M.A new perennial species, Silene nemrutensis (Silene sect. Spergulifoliae, Caryophyllaceae), is described and illustrated from SE-Anatolia. A macromorphological comparison with the similar species S. arguta is given as well as the ultrastructure of the seeds and pollen grains. Original photographs, geographical distribution, habitat and IUCN conservation status are also provided. © 2017 Magnolia Press.Item Curvature Analysis in Seed Surface of SEM Images of Silene Species from Türkiye(Multidisciplinary Digital Publishing Institute (MDPI), 2024) Martín-Gómez J.J.; Rodríguez-Lorenzo J.L.; Tocino Á.; Dadandi M.Y.; Yildiz K.; Cervantes E.Recently, based on light microscopy images, the tubercle structure on the seed surface of 100 Silene species was quantitatively described, including tubercle width, height, and curvature associated with general morphometric data. Curvature measures the rate of change of the tangent vector in a curve and can be calculated by the following methods described for Arabidopsis roots. Here, we apply curvature measurements to the SEM images of 40 Silene species from Türkiye, demonstrating that a quantitative analysis of tubercles can be made based on SEM images with similar results to optical photographs. The association of morphometric tubercle data allows for classification into six groups, five of them corresponding to described shapes: rugose (two groups), echinate, mammillate, and papillose, and a sixth group of tubercles plane on top. The curvature values vary between 20 and 200 mm−1 and differ among the morphological tubercle types described. The correlation of curvature values with other general measurements and morphological seed characteristics is investigated. Tubercle quantification not only is a useful tool for Silene taxonomy, but also provides the basis for the analysis of the genetic control and developmental effects on tubercle structure and shape in the seed surface. © 2024 by the authors.